Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 1010024: What's the y-intercept for
Click here to see answer by MathLover1(20849)

Question 1010023: The current in one part of a series circuit is 3-2j amps. The current in another part of the circuit is 2+4j amps. What would the total amps in the circuit be?
Click here to see answer by Alan3354(69443)

Question 1010208: The number of bacteria N(t)present in a culture at time t hours is given by the following.
N(t) = 1600(2)^t
Find the number of bacteria for the following values of t.
(a) t = 0 hours

bacteria
(b) t = 6 hours

bacteria
Click here to see answer by fractalier(6550)

Question 1010209: Solve by using the strategies for solving application problems.
A painter can paint a kitchen in 15 hours. An apprentice can paint the same kitchen in 30 hours. If they worked together, how long would it take them to paint the kitchen?
=h
Click here to see answer by rothauserc(4718)

Question 1010217: Find an equation that describes the following variation
y varies directly as z, and y = 46 when z = 460.

Click here to see answer by fractalier(6550)

Question 1010218: Find an equation that describes the following variation
y varies inversely as z, and y = 45 when z = 12.
Click here to see answer by fractalier(6550)

Question 1010219: The Distance it takes a car to stop varies directly as the square of the speed of the car. If it takes 125 feet for a car traveling 50 miles per hour to stop, what distance is required for a speed of 44 miles per hour?
(round to the nearest hundredth if necessary)
Click here to see answer by fractalier(6550)

Question 1010231: By the zero product property, if then what does x equal?
Click here to see answer by fractalier(6550)

Question 1010236: the quadratic function has how many zeros?
Click here to see answer by fractalier(6550)

Question 1010238: How do I solve by factoring?
Click here to see answer by fractalier(6550)

Question 1010238: How do I solve by factoring?
Click here to see answer by rothauserc(4718)

Question 1010230: The voltage in a circuit is decaying according to the function V(t) = V0e^-0.48t, where V0 is the starting voltage, t is the time in seconds and V(t) is the voltage after t seconds. If the starting voltage is 6 volts, what will be the voltage after 2.6 seconds?
Round your answer to the nearest hundredth of a volt
Click here to see answer by fractalier(6550)

Question 1010227: How do you solve by factoring
Click here to see answer by fractalier(6550)

Question 1010224: Solve the equation and express the solution in exact form.
log3 x = 2
Click here to see answer by fractalier(6550)

Question 1010241: Solve the equation and express the solution in exact form.
log3 x = 2
Click here to see answer by fractalier(6550)

Question 1010247: How do I write an equation for the parabola given a vertex of (-2,1) and a directrix of y=-3
Click here to see answer by josgarithmetic(39617)

Question 1010344: If there is only one solution to the equation 0= -x^2 + bx -8 what are the possible values of b?
Click here to see answer by josmiceli(19441)

Question 1010242: How did I write the parabola into vertex form by completing the square?
Click here to see answer by It is costly(175)

Question 1010402: Find the length, width, and height of the rectangular prism with the given volume.
Volume = 12 cubic inches
H = x in.
W = (x-1) in.
L = (x=4) in.
Please show your work and thank you!
Click here to see answer by KMST(5328)

Question 1010245: The cost to install new carpet in an office is determined by a $800 fixed fee plus a fee of $70 per square yard of floor space to be covered. How many square yards of floor space can be carpeted at a cost of $2500? Round to the nearest square yard.

=sq yd
Click here to see answer by fractalier(6550)

Question 1010822: Hello, I need to answer
Write an equation in standard form for the quadratic function whois graph passes through (8,0),(0,8),(-2,0)
How can I do that? Step by step would be very helpful with explanation please!
Thanks!
Click here to see answer by josgarithmetic(39617)

Question 1010854: I have a big problem with a quadratic cost function for a firm.
The cost function is 0.22222(q)^2
The price in the market is 8 (horizontal price line), and the point where these two lines intersect is the profit maximum. It should be an output quantity of 6, this is what the graph shows.
But, when I use mathematics to solve it, I have to differentiate the profit function 8q - 0.22222(q)^2 (ends up as 8 - 0.44444q) and set it equal to zero....and I end up with a weird answer for q, namely 18.00018. Anyone with mathematic economic experience help me out? I know this goes a little beyond just quadratics.
Click here to see answer by rothauserc(4718)

Question 1009237: A frame for a picture is 2.5 inches wide. The picture enclosed by the frame is 5 inches longer than it is wide. If the area of the picture itself is 300 square inches, determine the outer dimensions of the frame.
Click here to see answer by fractalier(6550)

Question 1010872: How to find a turning point if you are given this expression : -2x^2+40x-600

Click here to see answer by stanbon(75887)

Question 1010207: The cost to install new carpet in an office is determined by a $800 fixed fee plus a fee of $70 per square yard of floor space to be covered. How many square yards of floor space can be carpeted at a cost of $2500? Round to the nearest square yard.
= sq yd
Click here to see answer by fractalier(6550)

Question 1009404: The manager of a symphony computes that the symphony will earn -40p^2+1100p dollars per concert if they charge p dollars for tickets. What ticket price should the symphony charge in order to maximize its profits?
Click here to see answer by fractalier(6550)

Question 1010642: 1.two numbers,which differ by 3,have a product off 88.find them.
2.A man walks a certain ditance due north and then the same distance plus a further 7km de east.if the final distance from the stating point is 17km,find the distances he walks north to east.
3.A farmer makes a profit of x cents on each of the(x+5)eggs her hen lays.if her total profit was 84 cents,find the number of eggs the hen lays.
4.A boy buys x eggs at (x+8) cents each and (x-2) rashers of bacon at (x-3) cents each. if the total bills is $1.75, how many egs does he buy?
Click here to see answer by fractalier(6550)

Question 1010879: What is the value of P if 4x^2 + 20x + P is a perfect square?
Click here to see answer by josmiceli(19441)

Question 1010888: What is x squared minus 4x equal -3

Click here to see answer by Alan3354(69443)

Question 1010881: If a and b are the roots of the quadratic equation 3x^2 - 4x + 7 =0 , find:
1) a/3b + b/3a
2) 1/a^2 + 1/b^2

Thank you :)
Click here to see answer by Boreal(15235)

Question 1010881: If a and b are the roots of the quadratic equation 3x^2 - 4x + 7 =0 , find:
1) a/3b + b/3a
2) 1/a^2 + 1/b^2

Thank you :)
Click here to see answer by MathLover1(20849)

Question 1010881: If a and b are the roots of the quadratic equation 3x^2 - 4x + 7 =0 , find:
1) a/3b + b/3a
2) 1/a^2 + 1/b^2

Thank you :)
Click here to see answer by ikleyn(52781)

Question 1010950: Find two consecutive integers where the sum of the squares of the two integers equals 421.
Click here to see answer by addingup(3677)

Question 1010951: Hi,
Thank you for answering my question in advance.
My question is:
Find two numbers whose difference is 10 and the sum of whose squares is 250.
I set up two formulas for this question:
1) x-y = 10
2) x^2 + y^2 = 250
I am wondering where I went wrong.
Thank you
Click here to see answer by ankor@dixie-net.com(22740)

Question 1010956: Hi,
Thank you for answering my question in advance.
An airplane flies 355 miles to city A. Then, with better winds it continues onto city B, 448 miles from A, at a speed 15.8 mi/h greater than the first leg of the trip. The total flying time was 5.20 hrs. Find the speed at which the plane traveled to city A.
Thank you
Click here to see answer by josmiceli(19441)

Question 1010955: Hi,
Thank you for answering my question in advance.
A cylindrical tank having a diameter of 75.5 cm is placed so that it touches a wall. Find the radius of largest pipe that can fit into the space in between the tank and the wall.
The tank is in a corner.
Thank you
Click here to see answer by josgarithmetic(39617)

Question 1010952: Hi,
Thank you for answering my question in advance.
My question is:
A rectangular sheet of brass is twice as long as it is wide. Squares 3cmx3cm are cut from each corner, and the ends are turned up to form an open box having a volume of 648cm^3. What are the dimensions of the original sheet of brass.

Thank you
Click here to see answer by josgarithmetic(39617)

Question 1010958: Hi,
Thank you for answering my question in advance.
A trucker calculates that if he increased his average speed by 20 km/hr, he could travel his 800 km route in 2.0 hours less time than usual. Find his usual speed.
Thank you
Click here to see answer by josgarithmetic(39617)

Question 1010949: Ben is an excellent juggler. He juggles at a height of 4 feet and at a speed of 30 feet per second.
A)Set up an equation where height is a function of time.
B) How many seconds would it take for one of the balls to hit the ground if Ben missed it?

I got 0 = -16t +4t but I didn't know how to set it up after that or how to solve it. I'd really like some help with this. Thank you!
Click here to see answer by stanbon(75887)

Question 1010239: In the formula N = Pe^kt, N is the number of items in terms of an initial population P at a given time t and k is a growth constant equal to the percent of growth per unit time. How long will it take for the population of a certain country to double if its annual growth rate is 8.6%? Round to the nearest year.
Click here to see answer by fractalier(6550)

Question 1011058: . to travel from singapore to kuala lampur ,a distance kf 390km , motoridt finds that if he travels 6 km/h faster than its usual average speed,he will take 15 minutes less ti complete his usual journey . Calculate the usual avergae speed of the motorist
Click here to see answer by josgarithmetic(39617)

Question 1011055: Jack is trying to buy a sprinkler to water the middle of his garden. He wants it to sprinkle in the shape of a circle. The garden is a rectangle. There are three parts to this problem btw. \
l= 4x-2
w= x, then its split into the middle, and then in the middle where its split the measurement is 4x-2, and then again with x. I know its not very good and my friend knows about this site, but I dont want him to get under the impressions that this would be cheating. If there is a way I could upload a picture to this, I'd like to know. Maybe I could e-mail a picture?

But yeah, in the middle there is a are two lines going from top to bottom, and in the middle of the two lines, it says 4x-2 and on the outside it says x. there are 3 different parts as well.

a) make a polynomial to model the area of the entire lawn.
A = ?????

b) make a polynomial of the part of the garden being watered (the circle).
I dont remember this part. or the first.

C) write a polynomial to model the area of the lawn that is not watered. use 3.14 for pi.
I know in this one you subtract the polynomials of A and B.

Click here to see answer by josgarithmetic(39617)

Question 1011063: to travel from singapore to kuala lampur ,a distance of 390km , motorist finds that if he travels 6 km/h faster than its usual average speed,he will take 15 minutes less to complete his usual journey . Calculate the usual avergae speed of the motorist
Click here to see answer by josgarithmetic(39617)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 17551..17595, 17596..17640, 17641..17685, 17686..17730, 17731..17775, 17776..17820, 17821..17865, 17866..17910, 17911..17955, 17956..18000, 18001..18045, 18046..18090, 18091..18135, 18136..18180, 18181..18225, 18226..18270, 18271..18315, 18316..18360, 18361..18405, 18406..18450, 18451..18495, 18496..18540, 18541..18585, 18586..18630, 18631..18675, 18676..18720, 18721..18765, 18766..18810, 18811..18855, 18856..18900, 18901..18945, 18946..18990, 18991..19035, 19036..19080, 19081..19125, 19126..19170, 19171..19215, 19216..19260, 19261..19305, 19306..19350, 19351..19395, 19396..19440, 19441..19485, 19486..19530, 19531..19575, 19576..19620, 19621..19665, 19666..19710, 19711..19755, 19756..19800, 19801..19845, 19846..19890, 19891..19935, 19936..19980, 19981..20025, 20026..20070, 20071..20115, 20116..20160, 20161..20205, 20206..20250, 20251..20295, 20296..20340, 20341..20385, 20386..20430, 20431..20475, 20476..20520, 20521..20565, 20566..20610, 20611..20655, 20656..20700, 20701..20745, 20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650, 25651..25695, 25696..25740, 25741..25785, 25786..25830, 25831..25875, 25876..25920, 25921..25965, 25966..26010, 26011..26055, 26056..26100, 26101..26145, 26146..26190, 26191..26235, 26236..26280, 26281..26325, 26326..26370, 26371..26415, 26416..26460, 26461..26505, 26506..26550, 26551..26595, 26596..26640, 26641..26685, 26686..26730, 26731..26775, 26776..26820, 26821..26865, 26866..26910, 26911..26955, 26956..27000, 27001..27045, 27046..27090, 27091..27135, 27136..27180, 27181..27225, 27226..27270, 27271..27315, 27316..27360, 27361..27405, 27406..27450, 27451..27495, 27496..27540, 27541..27585, 27586..27630, 27631..27675, 27676..27720, 27721..27765, 27766..27810, 27811..27855, 27856..27900, 27901..27945, 27946..27990, 27991..28035, 28036..28080, 28081..28125, 28126..28170, 28171..28215, 28216..28260, 28261..28305, 28306..28350, 28351..28395, 28396..28440, 28441..28485, 28486..28530, 28531..28575, 28576..28620, 28621..28665, 28666..28710, 28711..28755, 28756..28800, 28801..28845, 28846..28890, 28891..28935, 28936..28980, 28981..29025, 29026..29070, 29071..29115, 29116..29160, 29161..29205, 29206..29250, 29251..29295, 29296..29340, 29341..29385, 29386..29430, 29431..29475, 29476..29520, 29521..29565, 29566..29610, 29611..29655, 29656..29700, 29701..29745, 29746..29790, 29791..29835, 29836..29880, 29881..29925, 29926..29970, 29971..30015, 30016..30060, 30061..30105, 30106..30150, 30151..30195, 30196..30240